Furnace



F. M. .ALLAEN Jan. 8 1924 FURNA C E Filed Nov. 2.9, 1921 /mwmlr f dan@ lAnon/vins PatentedJan. 8, 1924. I

Y 1,480,361, UNITED STATES PATENT oFFicE..

FRANK M. ALLEN, or cLAYxoN'r, DELAWARE, As'sreNon 'ro .GENERAL gmI'CAL jcoxrANY, or NEW YORK. N. Y.,

A` CORPORATION F NEW YORK.

rUnNAcn i y Application niea Nevember 29,1921. serai in. tiarsoi.

. To all whom t may co/rwem.'

lurgical purposes and fired by means of Be itknownf that I, FRANKM.-ALLEN, a citizen of the lUnited States, and resident of ClaymontBrandywine Hundredfcounty of New Castle, and State 'of Delaware, haveinvented certain newfand,l useful Improvevments in F urnaces, of whichthe following is aspecification. A

My invention relates :to furnaces and more particularly to rotary signedprimarily for chemical and metalliquid fuel The object of my-inventionis to provide suchfurnaces-,with a combustion chamber .of novelconstruction capable `of being rotatably adjusted to successivelypresent different portions thereof at the place of greatest wear-andwhich, all of its positions includes a, self-'supportingtop arch; afurther ob'ectof the invention is to construct the com ustion chamber insuch a manner that its ends ma. be reversed with respect to the burneran thereby increase the life of said chamber.` My ,inventioncontemplates further an` arrangement in which there are noV dead spacesaround the flame for the collection of dead air or other.,`

gases, and in `which `the combustion chamber, or m'ore specifically, thelining thereof, is constructed in sections capablev of being readilyremoved and replaced lfor purposes of repair and the like. Other objectsof the invention will appear from the description hereinafter andthefeatures of novelty will Y be pointed out in the appended claims..l

In the accompanying drawings, which illustrate a specific embodiment ofthe invention. without definingits limits, Ifi'gure' l' isa`diagrammatic sectional elevation othe furnace and its. `combustionchamber;

Fig. 2 s'an'end view of the combustion chamber; ig. 3 is an enlargeddetail sec- -tion of a preferredform' offoil llournerwhicli mayconstitute the firing means, and Fig` -1 j is an end yview thereof.

In the drawingsa'Y 10 vrepresents, a rotar Y furnace 'of anyconventional type whic 'may be ,supported in any -we1l known way andincludes all features customarily found' in such furnaces aS,vforinstance, the usual manhole nozzles through which thev .prod-4 uct is,periodically discharged. in batches..

The furnace, as shown, is providedwith an exit opening 11 at o ne end.adapted for connection withA the customary stack (not furnaces deshown'in the usual manner' at itsv other end, te furnace 10 is provided withan 1 i y 13 whenever this is desired or found necessary.` The cylinder13 is mounted upon a cradle so as to be rotatable about its axis,

said cradle consisting of rollers let rotatably supported upon acarriage 15 which itself is carried by `Wheels 16, so' as to be capableof `being moved toward and away from the furnace 10, 'referably uponl asuitable track 16. T e construction further -in cludes a wall` 17located upon the carriage 15 adjacent `to the one end of the combustionchamber a and having an aperture 18` into which the end of the oilburner19pro`ects. As shown in ,Fig l, the combustion c amber 'a 'referably islocated so as to be spaced both om the inlet opening 12 of the furnace`l0 and from thewall 17, to forman- .nulanair inlet spaces b and c resactively,

the purpose of which spacing wil appear more fully hereinafter. Theburner 19 may be connected by means-of a pipe20 with a source of oil -orother liquid fuel and with a source of atomizing agenti-such as .com-

pressed air, through the me ium of a pipe '21; suitablel valves 22 and2,3 'may be lo` cated in the pipes 20 and 21 for controlling the flow ofthe fuel and of the air respectively. The burner may conveniently be`mounted by' means of a swing-joint 24, so

as to be capable .o f being-swung aside to permit the removal. ofv thecombustion chamber a for the purpose to be more fully Vdescribed.hereinafter. While any,v conventionalV form of burner and-particularlyof liquid fuel or oilburner may be used for -l firing the furnace, avmultiple jet burner of the type. illustrated, by way of example, in

Figs, 3 and 4, is preferred'for this purpose.

This burner comprises an atomizing nozzle25fhaving its exit'e'nd rovidedwith a wall 26 '-.in which a plurality of' apertures 27 areV formed,said nozzle 25 being in comics munication with' the air pipe 21; av fuelpi`pe-4 28 `connected with the oil line y20V extends into the nozzle4'25 and terminates ina plurality of jets 29, each of which hask itsexit 'end in registry with one lof the apertures 11o i 27 and in closeproximity to the wall-26 of the nozzle 25. This tpe of burner gives ashorter and more e cient dame than a single 'et .burner of equalcapacity, and while t e same is referred, it is not to be .understood asprefuding the use of single jet burners in place thereof. l

In practice; the flame d from `the burner 19 asses first through theaperture 18'in the wall 17, then through the cylindricalcombustioncham'ber a and thenl into lthe furnace 10. At the same time,air enters the combustion chamber a through the space c and a furtheramount. of air passes into the furnace 10 through the spaceI b. It hasbeen found that with the use of this construction the refractorymaterial 13" of the combustion plained as follows:

chamber a, as well as thev refractory material located in those parts ofthe furnace which adjoin the s ace b lasts` a comparatively long time.

The flame d is surrounded both. within t the combustion chamber andwithin the inlet openingV 12 of the furnace by a layer of comparatively,cool air which insulates the' refractory material from-the flame, has` adirect cooling action on such materialand reducesv the temperaturewithin the combustion chamber a byy reducing the amountv of heatreflected from such material. The air introduced throghthe space b isburned in the furnace proper` in a zone just beyond the inlet opening12, that is,the final mixing and combustion occurs ata place where the-v flame flares or expands intotheffurnaceso that such air cannot bedesignated as false '-1 air, that is to say,'.air which merely'intertheinlet passage to the furnace and at thesame time to finish combustion ofthe oilas usf .freres with pro )er combustion. In other words, air is amitted at c to protect the walls of the combustion chamber a while airis admitted at b to protect the walls along soon as possible after thelatter has entered the furnace proper.

furnace, combustion is high, giving an average of fourteen per cent CO2,and the wallsA opening 11 of the furnace 10 is connected,

' preferably in such a manner that thear'nount of air passing throughthe space b is sui Icient to cause the ame, in passing such space, tofall slightly inward and away from the refractory lining and to permitthe air to ow between the ame and such lining. The air enteringthroughfthe spacec exerts a similar protecting action on the refractoryis fact may be ex' Thus the maximum Y heat value isextracted from thegas bythe l LantaarnI material 13 adjoining such space Within ment ofthe aforesaid cylinder brings a dif` ferent portion of thecombustion'chamber a' to a position in which it serveseas the to of suchchamber inpplace of that'portion lo the refractory material which hasbecome worn.

The combustion chamber a may also be re-` versed end for end so as `tobring that end which is farther fram the burner and,-ac

cordinglyy is subjected to the greatest wear, linto a position adjoiningthe wall 1-7, its I place being taken by 'the other end which hasreceived by far less wear. In this way the .life of the combustionchamber ma ybe said 'to be atleast four times the life o afchamthemanner described. Theladjustmentgof the composite cylinder, both asto-rotation` and reversibility, may be facilitated by first swin ing theburner 19 aside and'then moving t e carriage -15 in a direction awayfrom;

the furnace 110. f With the arrangement described, the combustionchamber produces ka self-supporting` arch for the top thereof; that isto say, the A cylindrical,.. y forms its own top arch regar ess of theposition to which the cy-linder'may be adjusted.`

combustion chamber, bein Furthermore, there are no dead spaces aroundtheflame or 4pockets or corners c in :which dead air. or other gases maycollect.

In addition to thejabove, the combustion chamber, the lining ofwhich-isbuilt-y in sections, may easily `be repaired if one of saidsections becomesl worn by taking out such damagedsectionf andreplacing'it' with auf other.`

In 'some cases, for instancey when a. less *concentrated iiame isemployed, `the combustion, chamber a may be so positioned as to engagewith its opposite ends the wall 17` and the inlet end 12 of the furnacerespec tively. With this arrangement the protecting envelope of air isnot present,but otherwise the advantages are the'same as those-`previously set forth.\

Various modifications in the specific form shown and described may bemade. within the scope of the claims without departing.from` the spiritof my invention.

I claim:

1. The combination of a furnace, a burner for firing thesame and a.rotatable combustion chamber locatedy between said furnace and burnerand having its o posite ends du@ plicates of eachother where y saidcombuselll-lxli tion chamber may beA reversed with respect to saidburner.

2. The combination of a furnace, a li uid fuel burner for firing thesame, and a cy indrical combustion chamberv located between l saidfurnace and said burner and rotatable about its axis to different'stationary polsi-- tions .whereby successive sections of saidcombustion' chamber constitute the thereof. y

` 3. The combination of a furnace, a li uid fuel burner for firin thesame, and a cy indrical rotatable comlustion chamber located between'said furnace and said burner and having its opposite ends duplicates ofeach other whereby said combustion chamber.v may be reversed withrespect `to said burner, said combustion chamber being adjustable aboutits axis to different stationary positions whereby successive sectionsof said combustion chamber may be made to constitute the y top thereof.

4. The lcombination of a furnace `having an entrance at one end, a wallspaced from said end and havin l in registry with sai aperture andadapted to project a flame therethrough, and a cornbustion chamberlocated between said end of the furnace and said wall and having its oneend spaced from said furnace end and its other end spaced from said wallto provide air inlets forsurrounding ,the flame within the combustionchamber and within the entrance to the furnace with a layer of cool'air.

5. The combination of arotary furnace having an inlet end, a wall spacedfrom said inlet end and provided with an aper ture, a burnerlocated inregistry with said .aperture for projectin a llame therethrough and acylindrical com ustion chamber locatedbetween saidend of the furnaceandsaid wall and having du licate ends spaced, respectively, from saisaidwall to provide air inlets whereby said flame within the .combustionchamber 'and v within the entrance tothe furnace is surlliquid fuelburner located in rounded by a layer of cool air, said combustionchamber being reversible with'respect to said burner.

6. The combination of a rotary furnace having an inlet end, a wallspacedfrom said inlet end and provided with an aperture, a reigistry with saida rture for projecting a ame therethrong and a cylindrical combustionchamber located between said end of the furnace Aec and said wall andhaving duplicate ends' spaced, respectively, from said furnace end andfrom said wall to whereby said flame within the lcombustion an aperture,a burner v furnace end and froml rovide ain inlets nace is surrounded bya layer of cool air, said combustion chamber being reversible withrespect to said burner and being rotatably adjustable about its axis tocause succhamberand within the entrance to the furcessive portionsthereof to constitute the' top of said combustion chamber.

l 7 The combination of a furnace, a burner for firing the same andacombustion cham- -ber located between said furnace and burner and havingits opposite ends duplicates of each .other whereby said combustionchamber may be reversed with respect to said burner,said combustionchamber compris.

ing a metal cylinder and a plurality of sections ofV refractory materialocated within said cylinder to form a linin therefor.

8.. The combination of a urnace havin a iirin inlet, a burner wallprovided wit an aperture, a burner projectinginto said.

aperture, and a combustion chamber interposed between said inlet andsaidburner Awall and having its ends spaced from the the burner wall reoutof operative relation to said inlet by the Amovement of the carriage andmounted to turn abcutan axis parallel to the path of said carriage.

11. The combinationof a furnace having' a iirin inlet, a carriagemovable toward an away rom 'said inlet, a burner wall mounted on saidcarriage, and a combustion chamber mounted Aon said carriage on'the sideof said wall which is toward the furnace, 4and adapted to b e broughtinto o erative relation to the furnace inlet, said'c amber being mountedto turn about its longitudinal axis.

12. The combination of a furnace havin ai firing inlet, a. carriagemovable toward and away from said inlet, a rotatable ccmbustion chambermounted on said carriage and arranged to be brought intol and out ofoperative relation to said inletby the movement of the carriage, and aburner arranged to co-operate with said chamber and pivotally movableinto and out of the path ,of movementof said chamber.

In testimony whereof I have hereuntoset m hand.

.y FRANK M. ALLEN.

